Single Walled Tank Underground Storage Tank Regulation

California Senate Bill #445

On September 25, 2014, the Governor signed Senate Bill 445 Underground storage tanks: hazardous substances: petroleum: groundwater and surface contamination.

This bill states that underground storage tanks installed after January 1, 1984 used to store hazardous material must meet the current containment regulations. The primary containment must be product tight and the tank’s secondary containment needs to meet the UL standards. Tanks utilized for motor vehicle fuels installed before January 1, 1997, must meet various monitoring, inspection, replacement, and upgrading requirements.

The tank owners/operators have two options before the date December 31, 2025:


Close the tank in place after authorized by the board


Remove the tanks from their site

Loans and grants are available through the RUST program to assist eligible small businesses to remove single-walled Underground Storage Tanks (USTs) and to replace them with double-walled UST’s. Eligible RUST fund owners/operators will not be able to perform any work until the grant or loan has been fully executed by the State Water Board.

The RUST Funding applies to those replacing, removing, or upgrading Underground Storage Tanks. Owners and operators may receive up to 100% financing for the project to comply with Health and Safety Code chapter 6.7. Low-interest loans are available for between $10,000 and $750,000, for a term of 10 to 20 years. The applicant must be a small business that employs fewer than 500 full-time and part-time employees. Grants are available for between $3,000 and $70,000 but the small business must employ fewer than 20 full-time and part-time employees.


If a release has occurred, owners/operators must investigate and clean the release prior to getting the tank removed. They have the Underground Storage Tank Cleanup Fund which provides owners/operators the opportunity to meet all requirements (Federal and State) without having the responsibility of paying for any damages that take place during their tank operations. The final day for the Fund will be January 1, 2026. The application process for the UST Cleanup Fund can be a lengthy process especially as the date continues to get closer.

Do not wait until the very last minute or you may miss out on a great opportunity for funding. This is not an inexpensive project.

If you believe your facility does not meet these requirements or would like additional information, please contact Western Pump using the form below.